KNAPTON, R. W.; CARTAR, R. V.; REYNOLDS, J. D. Do Hummingbirds Follow Sapsuckers to Food Sources?. Blue Jay, [S. l.], v. 43, n. 3, 1985. DOI: 10.29173/bluejay4729. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/4729. Acesso em: 26 sep. 2022.